Honestly replacing a 1/4 hp Trane fan for a 1/3 hp could be the correct motor with out really looking at the numbers. Factory (OEM) motors always seem to have more power to them than a generic one. Really have to match the amps of both motors. Since he went with a new motor; why he didn't replace the capacitors with generic ones is beyond me. New generic capacitors are rather cheap part, and should be replaced with the motor.